Broadband impedance and antenna tuning using quantum genetic algorithms for multistandard wireless communications

An adaptive broadband antenna tuning technique using quantum genetic algorithms is proposed in this paper. This method is fast and can achieve a global optimal solution. It is useful for software defined radio systems using a single antenna for multiple mobile and wireless bands. Simulations have been conducted using GSM, UMTS and both standards, with different antenna impedances. The frequency band of the dual standards ranges from 1.7 to 2.2GHz. Simulation results show good accuracy of the proposed tuning technique.